Chicago-latrobe 42674 Jobber Drill Bit Wire 4 Tialn Hss

Product Description

The CHICAGO-LATROBE 42674 is a TiAlN-coated high speed steel jobber length drill bit designed for high-performance drilling in demanding materials, including titanium. It carries a wire gauge size of 4, equivalent to 0.2090 inches in decimal. The 135-degree split point reduces walking on entry and requires less thrust to start the cut. With a 2-flute spiral flute design and right-hand cut, this bit is suited for production drilling and maintenance applications where consistent hole quality matters. It meets NAS 907 Type B standards and is rated as heavy duty grade. Licensed HVAC, mechanical, and industrial trades routinely stock jobber-length bits of this specification for metal fabrication and equipment repair work.

This drill bit is intended for use in materials such as titanium, stainless steel, and other high-strength metals where a standard bright-finish bit would underperform. The TiAlN coating provides heat resistance and extends tool life under high-speed or dry-cutting conditions. The straight-cylindrical shank fits standard drill chucks, making it compatible with benchtop drill presses, hand drills, and CNC drilling setups. It is a practical stock item for shops and field technicians who drill into hardened or exotic materials regularly. The 150ASP-TA series is built to NAS 907 Type B specification for consistency in aerospace and industrial applications.

Key Features

• TiAlN coating for extended tool life and heat resistance in difficult materials
• 135-degree split point reduces drill walk and lowers required entry thrust
• Right-hand, 2-flute regular spiral flute for efficient chip evacuation
• Web-thinned with tapered web configuration for reduced cutting resistance
• Meets NAS 907 Type B specification for aerospace and industrial use
• Straight-cylindrical shank fits standard drill chucks without an adapter

Compatibility

Designed as an OEM-style replacement or direct stocking drill bit for industrial and maintenance applications requiring a wire size 4 (0.2090 inch) jobber-length bit in the CHICAGO-LATROBE 150ASP-TA series meeting NAS 907 Type B standards.

Installation Notes

Install in a properly sized drill chuck, ensuring the straight-cylindrical shank is fully seated and the chuck is tightened before operation. Secure the workpiece firmly before drilling to prevent movement and ensure accurate hole placement. Follow applicable shop safety standards and wear appropriate eye protection when operating. Inspect the cutting edges for wear before each use, as a dull TiAlN-coated bit should be replaced rather than reground without proper equipment.